drm/i915/guc/slpc: Initial definitions for SLPC

Add macros to check for SLPC support. This feature is currently supported
for Gen12+ and enabled whenever GuC submission is enabled/selected.

Include templates for SLPC init/fini and enable.

v2: Move SLPC helper functions to intel_guc_slpc.c/.h. Define
basic template for SLPC structure in intel_guc_slpc_types.h.
Fix copyright (Michal W)

v3: Review comments (Michal W)

v4: Include supported/selected inside slpc struct (Michal W)

Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730202119.23810-2-vinay.belgaumkar@intel.com

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index a985c92..134b0ed 100644 (file)
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -186,6 +186,7 @@ i915-y += gt/uc/intel_uc.o \
          gt/uc/intel_guc_fw.o \
          gt/uc/intel_guc_log.o \
          gt/uc/intel_guc_log_debugfs.o \
+         gt/uc/intel_guc_slpc.o \
          gt/uc/intel_guc_submission.o \
          gt/uc/intel_huc.o \
          gt/uc/intel_huc_debugfs.o \

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
index 979128e..39bc3c1 100644 (file)
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
@@ -7,6 +7,7 @@
 #include "gt/intel_gt_irq.h"
 #include "gt/intel_gt_pm_irq.h"
 #include "intel_guc.h"
+#include "intel_guc_slpc.h"
 #include "intel_guc_ads.h"
 #include "intel_guc_submission.h"
 #include "i915_drv.h"
@@ -157,6 +158,7 @@ void intel_guc_init_early(struct intel_guc *guc)
        intel_guc_ct_init_early(&guc->ct);
        intel_guc_log_init_early(&guc->log);
        intel_guc_submission_init_early(guc);
+       intel_guc_slpc_init_early(&guc->slpc);
 
        mutex_init(&guc->send_mutex);
        spin_lock_init(&guc->irq_lock);

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index a954706..7da11a0 100644 (file)
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -15,6 +15,7 @@
 #include "intel_guc_ct.h"
 #include "intel_guc_log.h"
 #include "intel_guc_reg.h"
+#include "intel_guc_slpc_types.h"
 #include "intel_uc_fw.h"
 #include "i915_utils.h"
 #include "i915_vma.h"
@@ -30,6 +31,7 @@ struct intel_guc {
        struct intel_uc_fw fw;
        struct intel_guc_log log;
        struct intel_guc_ct ct;
+       struct intel_guc_slpc slpc;
 
        /* Global engine used to submit requests to GuC */
        struct i915_sched_engine *sched_engine;

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
new file mode 100644 (file)
index 0000000..40950f1
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#include "i915_drv.h"
+#include "intel_guc_slpc.h"
+#include "gt/intel_gt.h"
+
+static inline struct intel_guc *slpc_to_guc(struct intel_guc_slpc *slpc)
+{
+       return container_of(slpc, struct intel_guc, slpc);
+}
+
+static bool __detect_slpc_supported(struct intel_guc *guc)
+{
+       /* GuC SLPC is unavailable for pre-Gen12 */
+       return guc->submission_supported &&
+               GRAPHICS_VER(guc_to_gt(guc)->i915) >= 12;
+}
+
+static bool __guc_slpc_selected(struct intel_guc *guc)
+{
+       if (!intel_guc_slpc_is_supported(guc))
+               return false;
+
+       return guc->submission_selected;
+}
+
+void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc)
+{
+       struct intel_guc *guc = slpc_to_guc(slpc);
+
+       slpc->supported = __detect_slpc_supported(guc);
+       slpc->selected = __guc_slpc_selected(guc);
+}
+
+int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
+{
+       return 0;
+}
+
+void intel_guc_slpc_fini(struct intel_guc_slpc *slpc)
+{
+}

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
new file mode 100644 (file)
index 0000000..bc13968
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#ifndef _INTEL_GUC_SLPC_H_
+#define _INTEL_GUC_SLPC_H_
+
+#include "intel_guc_submission.h"
+#include "intel_guc_slpc_types.h"
+
+static inline bool intel_guc_slpc_is_supported(struct intel_guc *guc)
+{
+       return guc->slpc.supported;
+}
+
+static inline bool intel_guc_slpc_is_wanted(struct intel_guc *guc)
+{
+       return guc->slpc.selected;
+}
+
+static inline bool intel_guc_slpc_is_used(struct intel_guc *guc)
+{
+       return intel_guc_submission_is_used(guc) && intel_guc_slpc_is_wanted(guc);
+}
+
+void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc);
+
+int intel_guc_slpc_init(struct intel_guc_slpc *slpc);
+int intel_guc_slpc_enable(struct intel_guc_slpc *slpc);
+void intel_guc_slpc_fini(struct intel_guc_slpc *slpc);
+
+#endif

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
new file mode 100644 (file)
index 0000000..769c162
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#ifndef _INTEL_GUC_SLPC_TYPES_H_
+#define _INTEL_GUC_SLPC_TYPES_H_
+
+#include <linux/types.h>
+
+struct intel_guc_slpc {
+       bool supported;
+       bool selected;
+};
+
+#endif

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
index da57d18..e6bd940 100644 (file)
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
@@ -75,16 +75,18 @@ static void __confirm_options(struct intel_uc *uc)
        struct drm_i915_private *i915 = uc_to_gt(uc)->i915;
 
        drm_dbg(&i915->drm,
-               "enable_guc=%d (guc:%s submission:%s huc:%s)\n",
+               "enable_guc=%d (guc:%s submission:%s huc:%s slpc:%s)\n",
                i915->params.enable_guc,
                yesno(intel_uc_wants_guc(uc)),
                yesno(intel_uc_wants_guc_submission(uc)),
-               yesno(intel_uc_wants_huc(uc)));
+               yesno(intel_uc_wants_huc(uc)),
+               yesno(intel_uc_wants_guc_slpc(uc)));
 
        if (i915->params.enable_guc == 0) {
                GEM_BUG_ON(intel_uc_wants_guc(uc));
                GEM_BUG_ON(intel_uc_wants_guc_submission(uc));
                GEM_BUG_ON(intel_uc_wants_huc(uc));
+               GEM_BUG_ON(intel_uc_wants_guc_slpc(uc));
                return;
        }
 

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.h b/drivers/gpu/drm/i915/gt/uc/intel_uc.h
index e2da2b6..925a58c 100644 (file)
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.h
@@ -8,6 +8,7 @@
 
 #include "intel_guc.h"
 #include "intel_guc_submission.h"
+#include "intel_guc_slpc.h"
 #include "intel_huc.h"
 #include "i915_params.h"
 
@@ -83,6 +84,7 @@ __uc_state_checker(x, func, uses, used)
 uc_state_checkers(guc, guc);
 uc_state_checkers(huc, huc);
 uc_state_checkers(guc, guc_submission);
+uc_state_checkers(guc, guc_slpc);
 
 #undef uc_state_checkers
 #undef __uc_state_checker